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随着人们环保节能意识的增强,电动交通工具已经越来越广泛地被应用到人们的日常出行中。其中电动两轮车具备无污染、灵活便捷和价格便宜等优势,已成为广大消费者首选的短途交通工具。现在电动两轮车大多采用无刷直流电动机的方波控制方法,但转矩脉动较大,因而采用反电动势波形为正弦波的永磁同步电动机并通过矢量控制减小转矩脉动是目前电动两轮车控制应用的热点。要解决的关键技术:根据反电动势与霍尔信号的位置关系实现永磁同步电动机初始位置定位;运行中对电动机角度实时估测。并通过试验平台测试和实际试车测试,验证了此方法在电动两轮车驱动电动机控制器矢量控制策略上的可行性。
With people’s awareness of environmental protection and energy conservation, electric vehicles have been more and more widely applied to people’s daily travel. One electric two-wheeled vehicles with pollution-free, flexible and convenient, cheap and other advantages, has become the preferred short-distance transport for consumers. Now most of the electric two-wheeled vehicles using brushless DC motor square-wave control method, but the larger torque ripple, and thus the back-EMF waveform is a sine wave of the permanent magnet synchronous motor and reduce torque ripple by vector control is the current electric two Wheeler control application of hot spots. To solve the key technologies: According to the position of the back-EMF and Hall signals to achieve the initial position of permanent magnet synchronous motor positioning; real-time estimation of the motor angle during operation. The feasibility of this method in the vector control strategy of electric two-wheel drive motor controller is verified by test platform test and actual test test.